Head for well casings and tubings



Filed March 5, 1931 GUM/aw 7 .5 ML 7 a a a l of a i F %W/ I //V@ 6 7 9 MM i 7 a z a 1 i x w l l||.l| i ilIIH. WV :t\ 31 M W M, a 3 I 0 0 7 7 w 7 i (not shown) for holding Patented Nov. 22, 1.932 5 UNITED STATES PATENT'OFNFTICE WALLACE A. ROCKWELL, OF LONG BEACH, AND LAURENCE M. STAN FIELD, OF

WHITTIER, CALIFORNIA HEAD FOR WELL CASINGS AND TUBINGS Application filed March' 3,

This invention relates to oil and gas wells between the casing strings, one string is used, and and tube, whereby a tight joint is without the use of packing, and blow outs are prevented.

WVhile the drawing illustrates a embodiment of the invention, it is where more than between the caslng maintained whereby preferred to be understood that in adapting the means to meet specific needs may be varied and requirements, the design and changes in the minor details of construction may beresorted to within the scope of the invention as claimed, without departing from For a full understanding of the and the merits thereof, reference is the spirit thereof.

invention to be had to the following description and the drawing hereto attached,.in which:

Figure 1 is a sectional view of a c tubing head illustrative of an embodiment of member 10. The intermediate portion 17 v of the invention.

asing and Figure 2 is an enlarged fragmentary sectional view.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawing by like reference characters.

The numeral 1 designates the well tubing and the numerals 2, 3 and 4 indicate strings of easing. the upper A body member 5 is connected to end of the outermost casing string 2 and its intermediate portion 6 flares to provide aninner tapered wall to enact with slips base of the the casing strings sections thereof. The body 5 is enlarged and as indicated at 7. The

enlarged 7 is stepped, as indicated at with the and is supported therein by flange 11 upon the inner The casingstrmg is connected to the cap and the latter closes the space formed between the two casingstrings 2 and 8.

The cap member 10 is of annular formation and its upper portion is exterlorly reduced to form an outer shoulattached the tubing substantially the 1931. Serial No. 519,854.

der 12 and is interiorly enlarged and threaded,"as indicated atl4, to receive the lower end of a body member 15 similar in construction to the body member 5. A loclu'ng ring 16 comprising head and skirt portions is threaded into the upper part of the body member 5. The head of the locking ring 16 engages the shoulder 12 of the cap member 10 and the upper end of the body member 5. The lower end of the skirt portion of the locking ring 16engages the flange 11 and overlaps the shoulder 9. It is observed that the locking ring 16 positively engages the cap member 10 at two points 11 and 12, thereby securing said cap member against blow out and assuring a tight joint without necessitating the use of packing.

' The body member 15 is similar in structural details of the body member 5 and its lower end is reduced and externally threaded to engage the threaded portion 14 of the cap the body member 15 flares and the upper end ceive the skirt portion of alocking ring 18 similar to the locking ring 16. The inner shoulder formed at the base of the threaded part 19 is stepped to accommodate the outer flange 20 of a cap member 21 and the overlapping end of the skirt-portion of the look ing ring18. The upper portion of the cap member 21 is exteriorly reducedto provide a shoulder 22 and its inner portion isenlarged and screw threaded as indicated at 23. The casing string 4 is connected to the cap member 21. I v The casing head 24 has its lower end reduced externally-and threaded to match the threaded portion 23 of the cap member 21. The upper end of the opening is enlarged and threaded to receive a'riser 25 towhich is head body 26 which is same as the casing head bodies 5 and 15. The intermediate portion 27 of the body 26 is enlarged to'provide an 5 inner tapered wall adapted to coact with slips in a manner well understood. The opening of the body 26 is enlarged at its upper end and interiorly threaded as indicated at 28, to receive the skirt portion of a locking ring 1 0 air or gas, as the case maybe.

29. A ea or tubing head 30 is formed with the stepped shoulders, locking rings for sean outer ange 31 andan outer shoulder 32 curing t e caps to the respective bodies comat the base of anupper reduced portion. prlslng a head and a straight portion, the The tube 1 is threaded into the cap or head head engaging the outer shoulder of the cap 30 and the latter closes the space between said and the upper end of the body and the skirt 75 tube and the casing string 4. The head of portion engaging the outer flange and overthe locking ring 29 engages the shoulder 32 lapping the stepped shoulder, and a member and upper, end of. the body 26. The skirt fitted to the topmost cap and connected to portion of the locking ring 29 engages the the tubing head body. I flange 31 and overlaps the shoulder at the In testimony whereof we afiix our signa- 75 inner end of the threaded portion 28. tures..

It 'will be understood from the foregoing -WALLACE ROCKWELL reference being had to the accompanying I LAURENCE STANFIELDP -l drawing, that blow out is prevented and v I tightjoints assured without the necessity I g v w of using packing which is ,objectionablein the event of a fire. As indicated, the several bodies aretapped to-provide outlets to which pipes-maybe connected for carrying ofi' the at is claimed is: 1. A head for 'well casing and tubing com-. prising a body having its intermediate portion flared to provide an inner ta ered wall,

, and-having its up er portion: en arged and i I at interiorly threade landahaving the inner shoulder at the base of the threaded portion stepped, a cap member within the upper portion of the head and formed with an outer 1 d flange to engage the inner stebpedj portion ,2,

. of the shoulder, and having its upper portion reduced 'to provide an. outer shoulder, and a lockingring comprising a head and a straight portion, the head overlapping and s engaging the'outer-shoulder of the cap and y It.

' 40 2. Ahead for well casing and tubing com i I Y the uppervend of the said body, and the lower. end of the straight portion engaging the said outer flange and overlapping the upper stepped portion of the shoulder. a

prising a body having its intermediate por- I tion flared to provide an inner tapered wall, and having the upper end of the opening enlarged and interiorly threaded and having '45 the shoulder at the base of the threaded porh I 4 I a g 110 'tion stepped, a cap member having its upper part 'exteriorly reduced to provide an outer shoulder and interiorly enlarged and. threaded and provided adjacent its lower 1. end with an outer flangeto engage the inner v g Y I 11:;

stepped portion of the body, and a locking ring comprising a head toengage the outer shoulder of the cap and the upper end of the body and having its straight portion engaging the outer flange of the cap and overv .125 lapping the upper stepped portion of the in- 4 v ner shoulder.

3. In a well comprising several strings of casing and a tubje, a plurality of similar bodies each having the intermediate portion thereof flared and the'upper end enlarged and interiorly threaded and having the v shoulder at the base of the threaded portion steppech-coacting caps having upper shoulders 'and lower flanges, the latter engaging 

